Description (CNA)
A flaw was found in the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused assertion to replay it multiple times. Successful exploitation could allow an attacker to hijack a user's session and gain unauthorized access to the system as that user.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat Build of Keycloak | affected |
| Red Hat / Red Hat Build of Keycloak | affected |
| Red Hat / Red Hat Build of Keycloak | affected |
| Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack | affected |
| Red Hat / Red Hat Single Sign-On 7 | unaffected |
CWE
CWE-294
References
- https://access.redhat.com/security/cve/CVE-2026-18967
- https://bugzilla.redhat.com/show_bug.cgi?id=2511604
ADP enrichment
No English description supplied.
No references supplied.